In terms of college, IEM and HIT both provide similar career opportunities in the IT sector. Major recruiters like TCS, Infosys, CTS, Capgemini from the IT sector visit both the institutes. 

If you had to pick between the two engineering fields, you should always go with CS. If you select CS, you will be able to apply for a variety of government/public sector positions (ISRO, BARC, IOCL) after completing your B.tech. Only CS guys are qualified to apply for the majority of these government jobs. 

As you will get similar opportunities you can choose either. Also, outside of WB, no one cares if you're from IEM or HIT. Unless you're from JU, everything is the same.

If you are planning between these two, NITC CSE is a really good option. They offer cushy packages and decent companies visit the institute.

According to the recent placement report, the highest package offered is INR 49.75 lakhs per annum with an average of INR 11.58 lakhs per annum. A lot of companies like Aakash AESL, Bosch, Nokia, and HDFC visit the college.

When it comes to MNNIT the course curriculum of both IT and CSE is the same and there is no such difference overall. The placements are good too. The highest CTC offered is INR 49 lakhs per annum whereas the average salary is INR 10.28 lakhs per annum. Companies like BYJU, Amazon, and Capgemini hire students regularly from the campus.

Eventually, it boils down to which college meets your needs better. 

My younger sister has enrolled in the CSE program at NIT and it has excellent facilities for the program. The brand name of NIT and IIT is still more popular for some of the engineering aspirants because they lack awareness. Even my sister thought so before admissions, but NIT ranks #16 on the NIRF Engineering scale, IIIT A ranks #103, and IITs are usually in the top 5 in the same. 

Furthermore, your decision may change based on the following-

• The location of IIIT Allahabad is a factor contributing to its low popularity. It is located in a small village area called Jhalwa. There are no recreational facilities around and the only eating outlets are MacDonald's and Dominoes, which harm in the long run.
• The placement statistics of IIIT A show that it has a good 96% placement rate, but not many top companies come to visit because of the location. Networking is not an issue, but an institute in a developed area would have easy accessibility, lectures by renowned faculty, spots of refreshment; which are not present here.
• The hostels are not very good and those who reside in them, face difficulties related to social outings.
• Another fact of importance is that this institute has only two departments: Information Technology and Electronics and Communication.

You can see below, the comparatives of the institutes:

As you may see, IIIT A and NITs have excellent placement rates. The faculty will be more brilliant at IITs but students are dissatisfied even there. So you can see for yourself according to location, placement scenario, and brand name if that matters.

Both the colleges are similar to each other for the IT branch and provide equal facilities to their students, but IET DAVV is a little better than SGSITS. 

• Academics: The IT department at SGSITS was established in 2000, so it can be termed as new as compared to IET DAVV or other reputed colleges. But the IT department at IET DAVV was established in September 1996, so it is much better and older than SGSITS.
• Faculty: Both the colleges have great faculty who are talented and experienced in their subjects and some of them have even completed their PhDs from top IITs and IISC. 
• Fees: IET DAVV is a self-financed college and the fees are similar for all the branches and it is 65000 per annum. The fees of the IT branch at SGSITS are a little higher than IET DAVV and it is 70000 per annum. 
• Placements: The placements of both these colleges have been excellent and many top companies including Adobe, Cognizant, Infosys, and many others have been visiting the campus and offering jobs to many students with good packages. In SGSITS, the IT students must have a higher than 7.5 pointer to sit for campus interview, while CSE branch students must have a 6.5 pointer or higher.
• Exposure: SGSITS has an advantage as it is much older than IET DAVV, so it has more reputation in the state. But IET DAVV is also a reputed institute and provides a wide range of exposure to its students. 
• Extra-Curricular Activities: IET DAVV takes advantage of extracurricular activities like college fests, fresher's programs, and many others functions that are much better than at SGSITS. 

As both these colleges are similar to each other in every other aspect except a few, so you can choose anyone according to your preferences.

MNNIT Allahabad offers similar opportunities for IT and CSE branches. Other than a few subjects, the curriculum, faculty, and career opportunities are more or less the same for NIT Allahabad. 

Though Surathkal is promising a better university life with beaches and all. 

NIT Allahabad houses one of the country's biggest and brightest CSE departments. Here you're getting a good, competitive, and coding-oriented environment. Seniors are very supportive and the course is good. But the location is quite remote so if you belong to a metro city, you will be disappointed with the city life. 

In terms of placements, both institutes are almost on the same level. 

Another important aspect you can factor in while choosing is the distance of the institute from your home and choose the nearlest.